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Date: Fri, 12 Dec 2003 16:00:00 +0000 (GMT)
From: Matthew Kirkwood <matthew@hairy.beasts.org>
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Subject: Re: PROBLEM: floppy motor spins when floppy module not installed
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On Fri, 12 Dec 2003, Måns Rullgård wrote:

> > It is not a broken BIOS! The BIOS timer that ticks 18.206 times per
> > second has an ISR that, in addition to keeping time, turns OFF the FDC
> > motor after two seconds of inactivity. This ISR is taken away by
> > Linux. Therefore Linux must turn off that motor! It is a Linux bug,
> > not a BIOS bug. Linux took control away from the BIOS during boot.
>
> OK, but why doesn't it affect all machines?

Most likely, other machines take longer than two seconds from
probing the floppy to booting the kernel.

Matthew.